To begin with, he’s halakhically complicated: prayer quorum, seclusion, cross-dressing prohibition, I don’t know—are there not enough prohibitions already?

This is a strange discussion. You can just ask directly what the status of a transgender person is for various issues. What does that have to do with conversion?!

The definition of a transgender person is that of a eunuch, and his conversion is by immersion alone:
https://www.yeshiva.org.il/wiki/index.php/%D7%90%D7%A0%D7%A6%D7%99%D7%A7%D7%9C%D7%95%D7%A4%D7%93%D7%99%D7%AA_%D7%AA%D7%9C%D7%9E%D7%95%D7%93%D7%99%D7%AA:%D7%A1%D7%A8%D7%99%D7%A1#%D7%92%D7%A8

Let me sharpen the doubt:

1. When a man’s sexual organ has been cut off, and therefore he obviously will not undergo circumcision, does that invalidate the conversion?
And much more significantly than that:
2. Can a person who was born male but identifies as a woman—that is, intends to observe as a woman—convert?

Y.D.,

Fine, if a categorical declaration is enough to determine Jewish law, then he is indeed a eunuch.

Moshiko,

You didn’t sharpen it. You’re not asking about conversion, but about the status of a transgender person with no connection to conversion. The question is whether he is a man or a woman. Conversion branches off from that, like many other ramifications. There is no question here about conversion.

A question for the Rabbi. When I read about things like this, improper thoughts are aroused in me. Am I allowed to read them?

With Heaven’s help, 2 Adar II, 5784

On the halakhic implications of sex reassignment, an entire book was written called “A Generation of Upheavals.” See there.

Best regards,
Fish"l

Perush, I didn’t understand what thoughts are being aroused, and what you read here. It seems obvious to me that one may conduct a halakhic and philosophical discussion, even if as a result thoughts are aroused.

I hope this time I’ll manage to sharpen my words more: perhaps I’ll ask from another angle: would someone who is mentally incompetent with respect to one matter be exempt from the above commandments because of that? Can one convert someone who is mentally incompetent with respect to one matter?

All right, I’m sorry, but I’ve given up.